Vertical air purifier



FIG. 1 is a top-down perspective view of a vertical air purifier showing my new design;

FIG. 2 is a front side elevation view thereof;

FIG. 3 is a rear side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a bottom-up perspective view. 

CLAIM The ornamental design for a vertical air purifier, as shown and described. 